Sj Construction Interview Questions and Answers for Freshers

The thickness of a slab depends on the load it needs to bear and the type of material used.

• The thickness of a slab can range from 4 inches to 20 inches or more.

• The load capacity of the slab determines its thickness.

• The type of material used for the slab also affects its thickness.

• For example, a concrete slab for a residential building may be 4-6 inches thick, while a slab for a commercial building may be 8-12 inches th...read more

Concrete grades are used to determine the strength and durability of concrete.

• Concrete grades range from M5 to M100, with M20 being the most commonly used grade.

• The number after 'M' represents the compressive strength of the concrete in megapascals (MPa).

• Higher grades of concrete are used for structures that require greater strength and durability, such as bridges and high-rise buildings.

• Lower grades of concrete are us...read more

The thickness of plastering varies depending on the type of surface and the purpose of the plastering.

• The thickness of plastering for internal walls is usually 12-15mm.

• For external walls, the thickness of plastering is usually 20-25mm.

• The thickness of plastering for ceilings is usually 6-10mm.

• The thickness of plastering for decorative purposes can vary from 3-5mm.

• The thickness of plastering for rough surfaces may requi...read more